Limited Slip Differential Q2

The Prometeo helical LSD / Torsen differential is a direct replacement for the standard Alfa Romeo open differential.
Suitable for many Alfa Romeos - check the list below.

Unlike a conventional plate-style limited slip differential, the Prometeo Helical LSD differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operation.

A helical LSD differential never locks harshly with a set pre-load of wheel slip across the driven axle, like a conventional LSD. Rather, the Prometeo helical LSD differential automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree, and never locks.

This differential has many benefits over a standard open differential, including maximising traction and minimizing wheelspin, eliminating torque steer and snatching in front wheel drive cars compared to conventional LSD units, and a maintenance-free design which retains the standard oil lubrication.

We recommend to have the differential mounted by a trained mechanic!

Suitable for the following models / engines:

• Alfa 147 1.9 JTD and GTA
• Alfa 156 1.9 JTD, 2.5 V6 24V and GTA
• Alfa GT 1.9 JTD, 3.2 V6 24V
• Alfa 166 2.0 TS 16V, 2.5 V6 24V, 3.0 V6 24V and 3.2 V6 24V
• Spider/GTV (916) 3.0 V6 24V and 3.2 V6 24V

Variant 1:
Limited slip differential only

Variant 2:
Limited slip differential including mounting kit without adjustment shim set (consisting of 2 differential bearings, 2 seal rings, 2 O-rings, 12 bolts for the hypoid bevel, 1 spring clip for left-side drive shaft)

Variant 3:
NO LONGER AVAILABLE
Limited slip differential including mounting kit with adjustment shim set (consisting of 2 differential bearings, 2 seal rings, 2 O-rings, 12 bolts for the hypoid bevel, 1 spring clip for left-side drive shaft and 1 adjustment shim set)